What the Mystery of the Tick-Borne Meat Allergy Could Reveal

One spring evening in 2016, Lee Niegelsky’s underarm began to itch. An investment manager, he was doing housework around his condo, and he thought he’d been bitten by a chigger. But within 15 minutes, hives had erupted all over his body. He responded with what he calls a “typical man reaction” — if the hives didn’t clear up by the next day, he would have them checked. Fifteen minutes later, the itch had become unbearable. He needed help right away.